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Preparation of amidoximated bacterial cellulose and its adsorption mechanism for Cu 2+ and Pb 2+
Author(s) -
Chen Shiyan,
Shen Wei,
Yu Feng,
Hu Weili,
Wang Huaping
Publication year - 2010
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.31477
Subject(s) - adsorption , aqueous solution , chemistry , x ray photoelectron spectroscopy , cellulose , acrylonitrile , microporous material , fourier transform infrared spectroscopy , chelation , inorganic chemistry , nuclear chemistry , bacterial cellulose , polymer chemistry , polymer , organic chemistry , chemical engineering , engineering , copolymer
Amidoximated bacterial cellulose (Am‐BC) was prepared through successive polymer analogous reactions of bacterial cellulose with acrylonitrile in an alkaline medium followed by reaction with aqueous hydroxylamine. It was used as an adsorbent to remove Cu 2+ and Pb 2+ from aqueous solutions. The adsorption behaviors of Cu 2+ and Pb 2+ onto Am‐BC were observed to be pH‐dependent. The maximum adsorption capacity of 84 and 67 mg g –1 was observed, respectively, for Cu 2+ and Pb 2+ at pH 5. Scanning electronic microscopy (SEM) indicated that the microporous network structure of Am‐BC was maintained even after the modifacation. The adsorption mechanisms for Cu 2+ and Pb 2+ onto Am‐BC were investigated by fourier transform infrared spectroscopy (FTIR), ζ potential measurement and X‐ray photoelectron spectroscopy (XPS). The results revealed that the mechanism for the adsorption of Cu 2+ onto Am‐BC could be mainly described as between metal ions and nitrogen atom in the amidoxime groups or oxygen atom in the hydroxyl groups. However, in the adsorption process for Pb 2+ , precipitation played the important role along with electrostatic interactions, although chelation action also existed in the process accounted for the adsorption process. The regeneration of Am‐BC was studied by treatment with a strong complexing agent, ethylenediaminetetracetic acid (EDTA). © 2010 Wiley Periodicals, Inc. J Appl Polym Sci, 2010